Solid rubber tire.



PATENTED JULY 24, 1906.

J. A. SWINBHART. SOLID RUBBER-TIRE.

APPLICATION FILED 001.2, 1905.

InvEnToR.

ATTEsT.

BY "7 ANY.

UNI run STATES PATENT OFFICE. JAMES'ALLEN SWINEHART, ORAKRON, OHIO.

souo RUBBVER TIRE.

Specification of Letters latent.

Patented July 24, 1906.

To all ,whom it may concern:

Be it known that I, JAMES ALLEN SWINE- HART, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and use ful Improvements in Solid Rubber Tires; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which [0 it appertains to make and use the same.

My invention relates to solid rubber tires for automobiles and other vehicles; and the invention consists in the construction of the tire, substantially as shown and described, and

particularly pointed out in the claims.

In the accompanying drawin' 's, Figure 1 is a cross-section in perspective 0 a portion of a tire and rim united, showing the tire in-its natural condition. Fig. 2 is a cross-section of the tire in inverted position as compared with Fig. 1 and as it appears when a heavy load is'bearing thereon and the tire is compressed.

As shown in these views, the the A is of substantially the; same width from base to tread, with a circumferentially-ribbed peri hery, preferably convex from side to side; ut this particular formation of periphery is not in itself a material feature, and any suitable 3o f0rm of periphery may be used, whether ribbed or otherwise, but preferably of convex or rounded shape. It is to be noticed, how ever, that the tire is solid throughout and may be secured upon rim B in an well-known 5 way. Furthermore and essentially, the tire 0 each side and-having an aggregate-depth equal to approximately one-third of the crosssection of the tire at this point. This gives the tire spring or resiliency, which is not possible in a tire not thus channeled and reduced 5 in sustaining power, because the narrowed central portion or core yields in a manner and to a degree which could not occur if said grooves were solid like the remainder of the tire. Then there is also the further and ma- 5 o terial advantage of having a construction which is peculiarly adapted to carrying heavy loads, because when pressure settles own on the tire and the spring action provided for is exhausted there is. formed a flat broad sustaining-tread in which the side grooves or channels 4 are closed and the opposite shoulders or faces 5 and 6 thereof are brought together into mutual sustaining relations that extend through from the periphery down into the solid base of the tire.

The fact that the shape and form of the tire can be changed from the normal appearance or condition Fig. 1 to the compressed and wholl -altered form Fig. 2 shows how successful y the channels 4 perform their function, first, as contributin of the tire by reason of its being made more compressible thereby, .and, secondly, by closing up and bringing the entire cross-section of the tire in supporting service when a heavy load is on, and thus also affording a wide tread, which is so desirable.

The channels 4 are substantially in the shape of a letter V in cross-section, except that they are shown as rounded rather than otherwise at their inner and smallest depth transversely, and the said form has been found to be admirably adapted to this purpose; but there may be more or less variation in the cross-sectional shape of the channel without departing from the spirit and purpose of the invention.

The rim B has inturned side edges 6 engaged in channels in thebase of the tire, as is now common, and' the upper portion of the base of the tire is built out over the saidinturned edges in such wa that a firm backing is given to the sides of the tire when the load is on, as in Fig. 2. This is an important feature of construction in atire havin side channels as in this case, because the ho ding up of the sides of the tire under a load is required to make channels like thes practically available.

What I claim is- I ;1. As a new article of manufacture, a solid rubber tire of substantially the same width from base to tread having continuous V- shaped channels oppositely initssides substantially midway the depth of the tire, said channels having opposite walls5 and 6 adapt-' ed to close one upon the other when the tire is-underthe pressure of a load.

2. Asa new article of manufacture, a solid to the spring- IOC rubber tire of substantially the same width In testimony whereof I sign this specificafrom 01:88 to tileadbhavlilng channes'oppgsitey tion in the presence of two Witnesses.

in its ase, w ere y t e tire is a apte to e secured to a rim, and provided with V-shaped i JAMES ALLEN SWINEHART' channels in its sides between its base and periphery adapted to promote spring action in the tire.

Witnesses:

G. O. BAUGHMAN, B. SWINEHART. 

